Have played about a third of this.
It's a nice idea, but it seems to have been translated from another language (German, I think) so you often find that the missing word is actually two words or, in one case that I noticed, not even a real word.
At other times it doesn't quite make sense. For example, in the first puzzle:
•••Spoiler: the puzzle is about a severed head and the last missing answer is the body was DISMEMBERED. It doesn't accept BEHEADED as an answer, and dismembered doesn't have anything to do with the head. The answer might as well be TATTOOED or HAIRY for all the chance you have of guessing it from the story.
I wouldn't normally criticize a game for minor errors in translation, but for something based entirely around finding a precise word, it's crucial.